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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 975 (ENGINE CONTROLS - 4.3L (INTRODUCTION))REPAIR INSTRUCTIONSCAMSHAFT POSITION (CMP) SENSOR REPLACEMENTREMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the ignition coil wire from the distributor.
    2. Fig 1: View Of Ignition Coil Wire At Distributor
    GM302854Courtesy of GENERAL MOTORS CORP.
  2. Remove the spark plug wires from the distributor.
    1. Twist the spark plug wire boot 1/2 turn.
    2. Pull only on the boot or use a tool designed for this purpose in order to remove the wires from the distributor.
  3. Disconnect the camshaft position (CMP) sensor electrical connector (2).
    4. Fig 2: View Of Ground Strap And CMP & Fuel Pump/Oil Pressure Sensor Connectors
    GM782680Courtesy of GENERAL MOTORS CORP.
  4. Remove the distributor cap screws.
    5. Fig 3: View Of Distributor Cap Screws
    GM157984Courtesy of GENERAL MOTORS CORP.
  5. Remove the distributor cap.
    6. Fig 4: View Of Distributor Cap
    GM157986Courtesy of GENERAL MOTORS CORP.
  6. Remove the rotor screws.
    7. Fig 5: View Of Rotor Screws
    GM4354Courtesy of GENERAL MOTORS CORP.
  7. Remove the rotor.
    8. Fig 6: View Of Rotor
    GM156748Courtesy of GENERAL MOTORS CORP.
  8. Align the square slot in the reluctor wheel with the CMP sensor.
    9. Fig 7: View Of Square-Cut Hole In Vane Wheel
    GM156754Courtesy of GENERAL MOTORS CORP.
  9. Remove the CMP screws.
    10. Fig 8: View Of CMP Screws
    GM4341Courtesy of GENERAL MOTORS CORP.
  10. Remove the CMP sensor.
    11. Fig 9: View Of CMP Sensor & Screws
    GM301398Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.